Add a blog post

Hello, I added a blog post https://k33g.gitlab.io/articles/2018-10-20-OPENFAAS.html


It's a kind of quick start

Signed-off-by: Philippe Charrière <pcharriere@gitlab.com>

community.md

@@ -129,6 +129,7 @@ Key:
 
 | Blog/repo name and description                                          | Author       | Site     | Date        |
 |---------------------------------------------------------------------|--------------|----------|-------------|
+| [First contact with OpenFaaS](https://k33g.gitlab.io/articles/2018-10-20-OPENFAAS.html) | Philippe Charrière | GitLab.com | 20-Oct-2018 |
 | [ACI Information Group: OpenFaaS among wish-list items for AWS Lambda](https://searchaws.techtarget.com/opinion/Lambda-support-for-OpenFaaS-among-wish-list-items) | Chris Moyer | techtarget.com | 11-Oct-2018 |
 | [Serverless R functions with OpenFaaS](https://medium.com/@keyunie/serverless-r-functions-with-openfaas-1cd34905834d) | Keyu Nie | medium.com | 30-Sept-2018 |
 | [Serverless Data Fetching stack with OpenFaaS & OpenFlow](https://blog.lapw.at/serverless-data-fetching-stack-openfaas-openflow/) | Quentin Lapointe | blog.lapw.at | 23-Sept-2018 |